Valve for fume channels



July 1, 1958 S. GUSTAVSSON ETAL VALVE FOR FUME CHANNELS Filed June 7,1956 GUSWSSOW. flaw Y Ears fiwzejV 15/ fifiwmdihwww iinited StatesPatent Gfitice Patented Juiy 1, 1953 VALVE FOR none cnannnrs StigGustavsson, .ionkoping, lvlax Ydn'ng, Stockholm, and Lars Rune Nyiander,Enshcde, Sweden, assrgnors to Aktieholaget Svenslra Fiahtfabrilzen,Stockholm, Sweden Application June 7, 1955, Serial No. 513,864

2 *Claims. (3. 251--87) The present invention relates to a valve in achannel for fumes and similar dust-contaminated gaseous media, whichvalve consists of a valve housing with flanges for connection to thechannel, a valve element in said housing and a spindle for theadjustment of the valve element. It is prior known to use closingdevices in form of throttles or sliding dampers in channels for fumes orsimilar dust-contaminated gaseous media. It has however proved difficultto obtain proper sealing especially When using throttles. Slidingdampers have, on the other hand, the disadvantage of dust accumulationbetween the damper blade and the guiding means which results indifiiculties in maneuvering the sliding dampers. It is an object of theinvention to eliminate these drawbacks and to obtain a simple and robustvalve for use under heavy conditions.

The valve according to the invention is mainly characterized by acircular flow passage in a partition diagonally arranged in the housingsaid opening provided with an L-iron and L-iron flange as a seat for thevalve element and suitably equipped with a resilient sealing collar, anda dome-shaped valve element equipped with an outside tapered sealingflange around its periphery. The valve element is pivotally connected insuch a manner to an adjusting spindle of conventional designmovable fromthe outside and arranged perpendicular to said partitionthat the valveelement when being moved from the closing position will swing angularlytowards the said wall of the housing supporting the bearing for saidspindle and that the valve element when situated in fully open positionwill be in alignment with said wall thus forming an entirely open flowpassage of the device.

A suitable performance of this device for vertical channels ischaracterized by inclined plates arranged above the partition betweenthe side walls of the housing and said partition and slanting towardsthe periphery of said circular fiow passage opening, said platespreventing dust accumulation around said opening.

The invention will now be more fully described with reference to theaccompanying drawing illustrating an embodiment of a valve madeaccording to the invention.

In the drawing 2 designates a valve housing equipped with flanges 1 and12 for the mounting of the device in a channel. The valve housing is bymeans of a diagonally arranged partition 7 divided in two halves. Saidpartition is provided with a circular flow passage 8. 6 designates aflange of L-iron extending around said flow-passage. The L-iron can beequipped with a resilient sealing flange 4. A dome-shaped valve elementis designated 5. This is equipped with an outside tapered sealing flangearound its periphery and said valve element is at the point 13 pivotallyconnected to an adjusting spindle 14. Said adjusting spindle passes aside wall 15 of the valve housing. 16 designates a guiding bushing forthe spindle equipped with a packing box 17. The spindle 14 is by meansof flanges 18 connected to the bearing 2%, which is arranged to supporta nut 21 ball-shaped on its outside. Said nut 21 is rotatably movablealong a threaded rod 22. 24 designates guiding means for the bearing 29.Said guiding means 24 prevents the bearing 29 from rotating because ofthe turning of the rod by means of the wheel 26. The rod 22 is supportedin the bearing 25, which in its turn is supported by the console 23arranged on the wall 15. 10 designates an inspection door through whichthe space 11 at one side of the valve element is accessible. 27designates in the corresponding manner a space at the other side of thevalve element 5. 9 designates a number of sector-shaped plates, whichplates when using the closing device in a vertical channel form inclinedsurfaces slanting towards the periphery of the opening 8. Said surfacesare arranged to prevent dust accumulation around said opening.

What we claim is:

l. A valve structure for fume channels and similar ducts fordust-contaminated gaseous media, comprising a valve casing adapted toform a portion of the channel, a cross-wall diagonally arranged in thecasing, means defining an annular valve seat in said cross-wall, a valveelement, and a screw-threaded valve stem movable relative to said seatand guided in a sleeve projecting outwardly through the wall of saidvalve casing to support said valve element in registry with said valveseat, characterized in that said valve element comprises an outwardlyconvex hollow dome-shaped rigid body, and a tapered sealing flangemounted on the outer peripheral surface of said dome-shaped body andengageable with the inner surface of said valve seat, said body of thevalve element being pivotally connected on its rear concave side to saidvalve stem and devoid of other connections, whereby the valve elementbody upon displacement from the seat is free for pivotal displacement onsaid valve stem, upon re-engaging said seat to be self-centering andself-cleaning and in the'fully open position thereof to seat against thewall of the casing, thus enclosing in said sleeve and providing a smoothunrestricted passage for the flow of dust-contaminated gaseous media.

2. A valve structure according to claim 1 wherein said fume channel isvertical and said valve-supporting sleeve is mounted below saidcross-wall, and including inclined plates disposed above said cross-walland extending from the side walls of the valve casing to the peripheryof said valve seat to thereby constitute slide surfaces preventing dustaccumulation in said channel above said cross-wall.

References Cited in the file of this patent UNITED STATES PATENTS106,867 Pennock Aug. 30, 1870 934,188 Kirby Sept. 14, 1909 956,357Irving Apr. 26, 1910 1,588,752 Lang June 15, 1926 1,710,585 MatthiessenApr. 23, 1929 2,151,296 Knoerzer Mar. 21, 1939 2,577,210 Viola June 19,1951 FOREIGN PATENTS 1,063,200 France Dec. 16, 1953

